noeifevo 14 6v 5a lifepo4 batterie ladegerat fur 4s 12v 12 8v lifepo4 batterie mit lcd anzeige kuhlventilator automatischer abschaltung 1Due to some batteries with M25 charging connections that have integrated charging protocols, our charger cannot support batteries with built in charging protocols. Please confirm with the battery supplier before purchase whether the battery has an integrated charging protocol. For M25 (2+1+5) and M25 (2+4), the standard polarization is 1+ for positive and 2 for negative. If you require a different polarization, please let us know. Contact options: You